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E39 (1997 - 2003) The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

I was going to post something on this late last night, but decided to hit the sheets instead. I'm long burnt out on burning cd's and have been wanting to do an aux install. I have a 06/98 540i/6 with the tape deck and DSP. I was planning on following this write up this morning.

Then I pulled out the tape deck and saw this(See attached image), so the pins i was planning on tapping to isn't the same to the diagram on the diy posted above. I know about the Dice adaptors and upgrading to CD53 but is there any way i can just tap into this unit for an auxiliary input? I'm at home and had the day off wanted to do something to the car.

It's obviously a bit late, but you can do aux in by disassembling the tape deck and soldering in a plug. You're gonna have to google this one, but I have seen it done and the PO did it to my car before I got it.

I cant use my cassette player at all because whenever theres a tape in there the motor that spins the tape is loud. I think I'll just end up getting CD53. Seems like the best way to go here, unless there is a way to do this that I haven't found yet.